From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- drivers/pnp/pnpbios/Kconfig | 43 +++ drivers/pnp/pnpbios/Makefile | 9 + drivers/pnp/pnpbios/bioscalls.c | 491 ++++++++++++++++++++++++ drivers/pnp/pnpbios/core.c | 577 ++++++++++++++++++++++++++++ drivers/pnp/pnpbios/pnpbios.h | 169 +++++++++ drivers/pnp/pnpbios/proc.c | 286 ++++++++++++++ drivers/pnp/pnpbios/rsparser.c | 810 ++++++++++++++++++++++++++++++++++++++++ 7 files changed, 2385 insertions(+) create mode 100644 drivers/pnp/pnpbios/Kconfig create mode 100644 drivers/pnp/pnpbios/Makefile create mode 100644 drivers/pnp/pnpbios/bioscalls.c create mode 100644 drivers/pnp/pnpbios/core.c create mode 100644 drivers/pnp/pnpbios/pnpbios.h create mode 100644 drivers/pnp/pnpbios/proc.c create mode 100644 drivers/pnp/pnpbios/rsparser.c (limited to 'drivers/pnp/pnpbios') diff --git a/drivers/pnp/pnpbios/Kconfig b/drivers/pnp/pnpbios/Kconfig new file mode 100644 index 000000000..bcdac269a --- /dev/null +++ b/drivers/pnp/pnpbios/Kconfig @@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Plug and Play BIOS configuration +# +config PNPBIOS + bool "Plug and Play BIOS support" + depends on ISA && X86_32 + default n + help + Linux uses the PNPBIOS as defined in "Plug and Play BIOS + Specification Version 1.0A May 5, 1994" to autodetect built-in + mainboard resources (e.g. parallel port resources). + + Some features (e.g. event notification, docking station information, + ISAPNP services) are not currently implemented. + + If you would like the kernel to detect and allocate resources to + your mainboard devices (on some systems they are disabled by the + BIOS) say Y here. Also the PNPBIOS can help prevent resource + conflicts between mainboard devices and other bus devices. + + Note: ACPI is expected to supersede PNPBIOS some day, currently it + co-exists nicely. If you have a non-ISA system that supports ACPI, + you probably don't need PNPBIOS support. + +config PNPBIOS_PROC_FS + bool "Plug and Play BIOS /proc interface" + depends on PNPBIOS && PROC_FS + help + If you say Y here and to "/proc file system support", you will be + able to directly access the PNPBIOS. This includes resource + allocation, ESCD, and other PNPBIOS services. Using this + interface is potentially dangerous because the PNPBIOS driver will + not be notified of any resource changes made by writing directly. + Also some buggy systems will fault when accessing certain features + in the PNPBIOS /proc interface (e.g. "boot" configs). + + See the latest pcmcia-cs (stand-alone package) for a nice set of + PNPBIOS /proc interface tools (lspnp and setpnp). + + Unless you are debugging or have other specific reasons, it is + recommended that you say N here. + diff --git a/drivers/pnp/pnpbios/Makefile b/drivers/pnp/pnpbios/Makefile new file mode 100644 index 000000000..a91437c56 --- /dev/null +++ b/drivers/pnp/pnpbios/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the kernel PNPBIOS driver. +# +obj-y := pnp.o + +pnp-y := core.o bioscalls.o rsparser.o + +pnp-$(CONFIG_PNPBIOS_PROC_FS) += proc.o diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c new file mode 100644 index 000000000..ba5cfc3db --- /dev/null +++ b/drivers/pnp/pnpbios/bioscalls.c @@ -0,0 +1,491 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * bioscalls.c - the lowlevel layer of the PnPBIOS driver + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "pnpbios.h" + +__visible struct { + u16 offset; + u16 segment; +} pnp_bios_callpoint; + +/* + * These are some opcodes for a "static asmlinkage" + * As this code is *not* executed inside the linux kernel segment, but in a + * alias at offset 0, we need a far return that can not be compiled by + * default (please, prove me wrong! this is *really* ugly!) + * This is the only way to get the bios to return into the kernel code, + * because the bios code runs in 16 bit protected mode and therefore can only + * return to the caller if the call is within the first 64kB, and the linux + * kernel begins at offset 3GB... + */ + +asmlinkage __visible void pnp_bios_callfunc(void); + +__asm__(".text \n" + __ALIGN_STR "\n" + ".globl pnp_bios_callfunc\n" + "pnp_bios_callfunc:\n" + " pushl %edx \n" + " pushl %ecx \n" + " pushl %ebx \n" + " pushl %eax \n" + " lcallw *pnp_bios_callpoint\n" + " addl $16, %esp \n" + " lret \n" + ".previous \n"); + +#define Q2_SET_SEL(cpu, selname, address, size) \ +do { \ + struct desc_struct *gdt = get_cpu_gdt_rw((cpu)); \ + set_desc_base(&gdt[(selname) >> 3], (u32)(address)); \ + set_desc_limit(&gdt[(selname) >> 3], (size) - 1); \ +} while(0) + +static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092, + (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1); + +/* + * At some point we want to use this stack frame pointer to unwind + * after PnP BIOS oopses. + */ + +__visible u32 pnp_bios_fault_esp; +__visible u32 pnp_bios_fault_eip; +__visible u32 pnp_bios_is_utter_crap = 0; + +static spinlock_t pnp_bios_lock; + +/* + * Support Functions + */ + +static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3, + u16 arg4, u16 arg5, u16 arg6, u16 arg7, + void *ts1_base, u32 ts1_size, + void *ts2_base, u32 ts2_size) +{ + unsigned long flags; + u16 status; + struct desc_struct save_desc_40; + int cpu; + + /* + * PnP BIOSes are generally not terribly re-entrant. + * Also, don't rely on them to save everything correctly. + */ + if (pnp_bios_is_utter_crap) + return PNP_FUNCTION_NOT_SUPPORTED; + + cpu = get_cpu(); + save_desc_40 = get_cpu_gdt_rw(cpu)[0x40 / 8]; + get_cpu_gdt_rw(cpu)[0x40 / 8] = bad_bios_desc; + + /* On some boxes IRQ's during PnP BIOS calls are deadly. */ + spin_lock_irqsave(&pnp_bios_lock, flags); + + /* The lock prevents us bouncing CPU here */ + if (ts1_size) + Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size); + if (ts2_size) + Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size); + + __asm__ __volatile__("pushl %%ebp\n\t" + "pushl %%edi\n\t" + "pushl %%esi\n\t" + "pushl %%ds\n\t" + "pushl %%es\n\t" + "pushl %%fs\n\t" + "pushl %%gs\n\t" + "pushfl\n\t" + "movl %%esp, pnp_bios_fault_esp\n\t" + "movl $1f, pnp_bios_fault_eip\n\t" + "lcall %5,%6\n\t" + "1:popfl\n\t" + "popl %%gs\n\t" + "popl %%fs\n\t" + "popl %%es\n\t" + "popl %%ds\n\t" + "popl %%esi\n\t" + "popl %%edi\n\t" + "popl %%ebp\n\t":"=a"(status) + :"0"((func) | (((u32) arg1) << 16)), + "b"((arg2) | (((u32) arg3) << 16)), + "c"((arg4) | (((u32) arg5) << 16)), + "d"((arg6) | (((u32) arg7) << 16)), + "i"(PNP_CS32), "i"(0) + :"memory"); + spin_unlock_irqrestore(&pnp_bios_lock, flags); + + get_cpu_gdt_rw(cpu)[0x40 / 8] = save_desc_40; + put_cpu(); + + /* If we get here and this is set then the PnP BIOS faulted on us. */ + if (pnp_bios_is_utter_crap) { + printk(KERN_ERR + "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n"); + printk(KERN_ERR + "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n"); + printk(KERN_ERR + "PnPBIOS: Check with your vendor for an updated BIOS\n"); + } + + return status; +} + +void pnpbios_print_status(const char *module, u16 status) +{ + switch (status) { + case PNP_SUCCESS: + printk(KERN_ERR "PnPBIOS: %s: function successful\n", module); + break; + case PNP_NOT_SET_STATICALLY: + printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", + module); + break; + case PNP_UNKNOWN_FUNCTION: + printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", + module); + break; + case PNP_FUNCTION_NOT_SUPPORTED: + printk(KERN_ERR + "PnPBIOS: %s: function not supported on this system\n", + module); + break; + case PNP_INVALID_HANDLE: + printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module); + break; + case PNP_BAD_PARAMETER: + printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", + module); + break; + case PNP_SET_FAILED: + printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", + module); + break; + case PNP_EVENTS_NOT_PENDING: + printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module); + break; + case PNP_SYSTEM_NOT_DOCKED: + printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", + module); + break; + case PNP_NO_ISA_PNP_CARDS: + printk(KERN_ERR + "PnPBIOS: %s: no isapnp cards are installed on this system\n", + module); + break; + case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES: + printk(KERN_ERR + "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", + module); + break; + case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY: + printk(KERN_ERR + "PnPBIOS: %s: unable to undock, the system does not have a battery\n", + module); + break; + case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT: + printk(KERN_ERR + "PnPBIOS: %s: could not dock due to resource conflicts\n", + module); + break; + case PNP_BUFFER_TOO_SMALL: + printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", + module); + break; + case PNP_USE_ESCD_SUPPORT: + printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module); + break; + case PNP_MESSAGE_NOT_SUPPORTED: + printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", + module); + break; + case PNP_HARDWARE_ERROR: + printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occurred\n", + module); + break; + default: + printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, + status); + break; + } +} + +/* + * PnP BIOS Low Level Calls + */ + +#define PNP_GET_NUM_SYS_DEV_NODES 0x00 +#define PNP_GET_SYS_DEV_NODE 0x01 +#define PNP_SET_SYS_DEV_NODE 0x02 +#define PNP_GET_EVENT 0x03 +#define PNP_SEND_MESSAGE 0x04 +#define PNP_GET_DOCKING_STATION_INFORMATION 0x05 +#define PNP_SET_STATIC_ALLOCED_RES_INFO 0x09 +#define PNP_GET_STATIC_ALLOCED_RES_INFO 0x0a +#define PNP_GET_APM_ID_TABLE 0x0b +#define PNP_GET_PNP_ISA_CONFIG_STRUC 0x40 +#define PNP_GET_ESCD_INFO 0x41 +#define PNP_READ_ESCD 0x42 +#define PNP_WRITE_ESCD 0x43 + +/* + * Call PnP BIOS with function 0x00, "get number of system device nodes" + */ +static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, + PNP_TS1, PNP_DS, 0, 0, data, + sizeof(struct pnp_dev_node_info), NULL, 0); + data->no_nodes &= 0xff; + return status; +} + +int pnp_bios_dev_node_info(struct pnp_dev_node_info *data) +{ + int status = __pnp_bios_dev_node_info(data); + + if (status) + pnpbios_print_status("dev_node_info", status); + return status; +} + +/* + * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible + * death if they are asked to access the "current" configuration. + * Therefore, if it's a matter of indifference, it's better to call + * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0. + */ + +/* + * Call PnP BIOS with function 0x01, "get system device node" + * Input: *nodenum = desired node, + * boot = whether to get nonvolatile boot (!=0) + * or volatile current (0) config + * Output: *nodenum=next node or 0xff if no more nodes + */ +static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, + struct pnp_bios_node *data) +{ + u16 status; + u16 tmp_nodenum; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + if (!boot && pnpbios_dont_use_current_config) + return PNP_FUNCTION_NOT_SUPPORTED; + tmp_nodenum = *nodenum; + status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, + boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum, + sizeof(tmp_nodenum), data, 65536); + *nodenum = tmp_nodenum; + return status; +} + +int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data) +{ + int status; + + status = __pnp_bios_get_dev_node(nodenum, boot, data); + if (status) + pnpbios_print_status("get_dev_node", status); + return status; +} + +/* + * Call PnP BIOS with function 0x02, "set system device node" + * Input: *nodenum = desired node, + * boot = whether to set nonvolatile boot (!=0) + * or volatile current (0) config + */ +static int __pnp_bios_set_dev_node(u8 nodenum, char boot, + struct pnp_bios_node *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + if (!boot && pnpbios_dont_use_current_config) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, + boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL, + 0); + return status; +} + +int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data) +{ + int status; + + status = __pnp_bios_set_dev_node(nodenum, boot, data); + if (status) { + pnpbios_print_status("set_dev_node", status); + return status; + } + if (!boot) { /* Update devlist */ + status = pnp_bios_get_dev_node(&nodenum, boot, data); + if (status) + return status; + } + return status; +} + +/* + * Call PnP BIOS with function 0x05, "get docking station information" + */ +int pnp_bios_dock_station_info(struct pnp_docking_station_info *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, + PNP_DS, 0, 0, 0, 0, data, + sizeof(struct pnp_docking_station_info), NULL, + 0); + return status; +} + +/* + * Call PnP BIOS with function 0x0a, "get statically allocated resource + * information" + */ +static int __pnp_bios_get_stat_res(char *info) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, + PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0); + return status; +} + +int pnp_bios_get_stat_res(char *info) +{ + int status; + + status = __pnp_bios_get_stat_res(info); + if (status) + pnpbios_print_status("get_stat_res", status); + return status; +} + +/* + * Call PnP BIOS with function 0x40, "get isa pnp configuration structure" + */ +static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) +{ + u16 status; + + if (!pnp_bios_present()) + return PNP_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, + 0, 0, 0, 0, data, + sizeof(struct pnp_isa_config_struc), NULL, 0); + return status; +} + +int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data) +{ + int status; + + status = __pnp_bios_isapnp_config(data); + if (status) + pnpbios_print_status("isapnp_config", status); + return status; +} + +/* + * Call PnP BIOS with function 0x41, "get ESCD info" + */ +static int __pnp_bios_escd_info(struct escd_info_struc *data) +{ + u16 status; + + if (!pnp_bios_present()) + return ESCD_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, + PNP_TS1, PNP_DS, data, + sizeof(struct escd_info_struc), NULL, 0); + return status; +} + +int pnp_bios_escd_info(struct escd_info_struc *data) +{ + int status; + + status = __pnp_bios_escd_info(data); + if (status) + pnpbios_print_status("escd_info", status); + return status; +} + +/* + * Call PnP BIOS function 0x42, "read ESCD" + * nvram_base is determined by calling escd_info + */ +static int __pnp_bios_read_escd(char *data, u32 nvram_base) +{ + u16 status; + + if (!pnp_bios_present()) + return ESCD_FUNCTION_NOT_SUPPORTED; + status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, + 0, data, 65536, __va(nvram_base), 65536); + return status; +} + +int pnp_bios_read_escd(char *data, u32 nvram_base) +{ + int status; + + status = __pnp_bios_read_escd(data, nvram_base); + if (status) + pnpbios_print_status("read_escd", status); + return status; +} + +void pnpbios_calls_init(union pnp_bios_install_struct *header) +{ + int i; + + spin_lock_init(&pnp_bios_lock); + pnp_bios_callpoint.offset = header->fields.pm16offset; + pnp_bios_callpoint.segment = PNP_CS16; + + for_each_possible_cpu(i) { + struct desc_struct *gdt = get_cpu_gdt_rw(i); + if (!gdt) + continue; + set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS32], + (unsigned long)&pnp_bios_callfunc); + set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS16], + (unsigned long)__va(header->fields.pm16cseg)); + set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_DS], + (unsigned long)__va(header->fields.pm16dseg)); + } +} diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c new file mode 100644 index 000000000..9b760e73e --- /dev/null +++ b/drivers/pnp/pnpbios/core.c @@ -0,0 +1,577 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pnpbios -- PnP BIOS driver + * + * This driver provides access to Plug-'n'-Play services provided by + * the PnP BIOS firmware, described in the following documents: + * Plug and Play BIOS Specification, Version 1.0A, 5 May 1994 + * Plug and Play BIOS Clarification Paper, 6 October 1994 + * Compaq Computer Corporation, Phoenix Technologies Ltd., Intel Corp. + * + * Originally (C) 1998 Christian Schmidt + * Modifications (C) 1998 Tom Lees + * Minor reorganizations by David Hinds + * Further modifications (C) 2001, 2002 by: + * Alan Cox + * Thomas Hood + * Brian Gerst + * + * Ported to the PnP Layer and several additional improvements (C) 2002 + * by Adam Belay + */ + +/* Change Log + * + * Adam Belay - - March 16, 2003 + * rev 1.01 Only call pnp_bios_dev_node_info once + * Added pnpbios_print_status + * Added several new error messages and info messages + * Added pnpbios_interface_attach_device + * integrated core and proc init system + * Introduced PNPMODE flags + * Removed some useless includes + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "../base.h" +#include "pnpbios.h" + +/* + * + * PnP BIOS INTERFACE + * + */ + +static union pnp_bios_install_struct *pnp_bios_install = NULL; + +int pnp_bios_present(void) +{ + return (pnp_bios_install != NULL); +} + +struct pnp_dev_node_info node_info; + +/* + * + * DOCKING FUNCTIONS + * + */ + +static struct completion unload_sem; + +/* + * (Much of this belongs in a shared routine somewhere) + */ +static int pnp_dock_event(int dock, struct pnp_docking_station_info *info) +{ + static char const sbin_pnpbios[] = "/sbin/pnpbios"; + char *argv[3], **envp, *buf, *scratch; + int i = 0, value; + + if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL))) + return -ENOMEM; + if (!(buf = kzalloc(256, GFP_KERNEL))) { + kfree(envp); + return -ENOMEM; + } + + /* FIXME: if there are actual users of this, it should be + * integrated into the driver core and use the usual infrastructure + * like sysfs and uevents + */ + argv[0] = (char *)sbin_pnpbios; + argv[1] = "dock"; + argv[2] = NULL; + + /* minimal command environment */ + envp[i++] = "HOME=/"; + envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; + +#ifdef DEBUG + /* hint that policy agent should enter no-stdout debug mode */ + envp[i++] = "DEBUG=kernel"; +#endif + /* extensible set of named bus-specific parameters, + * supporting multiple driver selection algorithms. + */ + scratch = buf; + + /* action: add, remove */ + envp[i++] = scratch; + scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1; + + /* Report the ident for the dock */ + envp[i++] = scratch; + scratch += sprintf(scratch, "DOCK=%x/%x/%x", + info->location_id, info->serial, info->capabilities); + envp[i] = NULL; + + value = call_usermodehelper(sbin_pnpbios, argv, envp, UMH_WAIT_EXEC); + kfree(buf); + kfree(envp); + return 0; +} + +/* + * Poll the PnP docking at regular intervals + */ +static int pnp_dock_thread(void *unused) +{ + static struct pnp_docking_station_info now; + int docked = -1, d = 0; + + set_freezable(); + while (1) { + int status; + + /* + * Poll every 2 seconds + */ + msleep_interruptible(2000); + + if (try_to_freeze()) + continue; + + status = pnp_bios_dock_station_info(&now); + + switch (status) { + /* + * No dock to manage + */ + case PNP_FUNCTION_NOT_SUPPORTED: + complete_and_exit(&unload_sem, 0); + case PNP_SYSTEM_NOT_DOCKED: + d = 0; + break; + case PNP_SUCCESS: + d = 1; + break; + default: + pnpbios_print_status("pnp_dock_thread", status); + printk(KERN_WARNING "PnPBIOS: disabling dock monitoring.\n"); + complete_and_exit(&unload_sem, 0); + } + if (d != docked) { + if (pnp_dock_event(d, &now) == 0) { + docked = d; +#if 0 + printk(KERN_INFO + "PnPBIOS: Docking station %stached\n", + docked ? "at" : "de"); +#endif + } + } + } + complete_and_exit(&unload_sem, 0); +} + +static int pnpbios_get_resources(struct pnp_dev *dev) +{ + u8 nodenum = dev->number; + struct pnp_bios_node *node; + + if (!pnpbios_is_dynamic(dev)) + return -EPERM; + + pnp_dbg(&dev->dev, "get resources\n"); + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -1; + if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { + kfree(node); + return -ENODEV; + } + pnpbios_read_resources_from_node(dev, node); + dev->active = pnp_is_active(dev); + kfree(node); + return 0; +} + +static int pnpbios_set_resources(struct pnp_dev *dev) +{ + u8 nodenum = dev->number; + struct pnp_bios_node *node; + int ret; + + if (!pnpbios_is_dynamic(dev)) + return -EPERM; + + pnp_dbg(&dev->dev, "set resources\n"); + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -1; + if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { + kfree(node); + return -ENODEV; + } + if (pnpbios_write_resources_to_node(dev, node) < 0) { + kfree(node); + return -1; + } + ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node); + kfree(node); + if (ret > 0) + ret = -1; + return ret; +} + +static void pnpbios_zero_data_stream(struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + unsigned int len; + int i; + + while ((char *)p < (char *)end) { + if (p[0] & 0x80) { /* large tag */ + len = (p[2] << 8) | p[1]; + p += 3; + } else { + if (((p[0] >> 3) & 0x0f) == 0x0f) + return; + len = p[0] & 0x07; + p += 1; + } + for (i = 0; i < len; i++) + p[i] = 0; + p += len; + } + printk(KERN_ERR + "PnPBIOS: Resource structure did not contain an end tag.\n"); +} + +static int pnpbios_disable_resources(struct pnp_dev *dev) +{ + struct pnp_bios_node *node; + u8 nodenum = dev->number; + int ret; + + if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev)) + return -EPERM; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + + if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { + kfree(node); + return -ENODEV; + } + pnpbios_zero_data_stream(node); + + ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node); + kfree(node); + if (ret > 0) + ret = -1; + return ret; +} + +/* PnP Layer support */ + +struct pnp_protocol pnpbios_protocol = { + .name = "Plug and Play BIOS", + .get = pnpbios_get_resources, + .set = pnpbios_set_resources, + .disable = pnpbios_disable_resources, +}; + +static int __init insert_device(struct pnp_bios_node *node) +{ + struct list_head *pos; + struct pnp_dev *dev; + char id[8]; + int error; + + /* check if the device is already added */ + list_for_each(pos, &pnpbios_protocol.devices) { + dev = list_entry(pos, struct pnp_dev, protocol_list); + if (dev->number == node->handle) + return -EEXIST; + } + + pnp_eisa_id_to_string(node->eisa_id & PNP_EISA_ID_MASK, id); + dev = pnp_alloc_dev(&pnpbios_protocol, node->handle, id); + if (!dev) + return -ENOMEM; + + pnpbios_parse_data_stream(dev, node); + dev->active = pnp_is_active(dev); + dev->flags = node->flags; + if (!(dev->flags & PNPBIOS_NO_CONFIG)) + dev->capabilities |= PNP_CONFIGURABLE; + if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev)) + dev->capabilities |= PNP_DISABLE; + dev->capabilities |= PNP_READ; + if (pnpbios_is_dynamic(dev)) + dev->capabilities |= PNP_WRITE; + if (dev->flags & PNPBIOS_REMOVABLE) + dev->capabilities |= PNP_REMOVABLE; + + /* clear out the damaged flags */ + if (!dev->active) + pnp_init_resources(dev); + + error = pnp_add_device(dev); + if (error) { + put_device(&dev->dev); + return error; + } + + pnpbios_interface_attach_device(node); + + return 0; +} + +static void __init build_devlist(void) +{ + u8 nodenum; + unsigned int nodes_got = 0; + unsigned int devs = 0; + struct pnp_bios_node *node; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return; + + for (nodenum = 0; nodenum < 0xff;) { + u8 thisnodenum = nodenum; + /* eventually we will want to use PNPMODE_STATIC here but for now + * dynamic will help us catch buggy bioses to add to the blacklist. + */ + if (!pnpbios_dont_use_current_config) { + if (pnp_bios_get_dev_node + (&nodenum, (char)PNPMODE_DYNAMIC, node)) + break; + } else { + if (pnp_bios_get_dev_node + (&nodenum, (char)PNPMODE_STATIC, node)) + break; + } + nodes_got++; + if (insert_device(node) == 0) + devs++; + if (nodenum <= thisnodenum) { + printk(KERN_ERR + "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", + (unsigned int)nodenum, + (unsigned int)thisnodenum); + break; + } + } + kfree(node); + + printk(KERN_INFO + "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n", + nodes_got, nodes_got != 1 ? "s" : "", devs); +} + +/* + * + * INIT AND EXIT + * + */ + +static int pnpbios_disabled; +int pnpbios_dont_use_current_config; + +static int __init pnpbios_setup(char *str) +{ + int invert; + + while ((str != NULL) && (*str != '\0')) { + if (strncmp(str, "off", 3) == 0) + pnpbios_disabled = 1; + if (strncmp(str, "on", 2) == 0) + pnpbios_disabled = 0; + invert = (strncmp(str, "no-", 3) == 0); + if (invert) + str += 3; + if (strncmp(str, "curr", 4) == 0) + pnpbios_dont_use_current_config = invert; + str = strchr(str, ','); + if (str != NULL) + str += strspn(str, ", \t"); + } + + return 1; +} + +__setup("pnpbios=", pnpbios_setup); + +/* PnP BIOS signature: "$PnP" */ +#define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24)) + +static int __init pnpbios_probe_system(void) +{ + union pnp_bios_install_struct *check; + u8 sum; + int length, i; + + printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n"); + + /* + * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS + * structure and, if one is found, sets up the selectors and + * entry points + */ + for (check = (union pnp_bios_install_struct *)__va(0xf0000); + check < (union pnp_bios_install_struct *)__va(0xffff0); + check = (void *)check + 16) { + if (check->fields.signature != PNP_SIGNATURE) + continue; + printk(KERN_INFO + "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", + check); + length = check->fields.length; + if (!length) { + printk(KERN_ERR + "PnPBIOS: installation structure is invalid, skipping\n"); + continue; + } + for (sum = 0, i = 0; i < length; i++) + sum += check->chars[i]; + if (sum) { + printk(KERN_ERR + "PnPBIOS: installation structure is corrupted, skipping\n"); + continue; + } + if (check->fields.version < 0x10) { + printk(KERN_WARNING + "PnPBIOS: PnP BIOS version %d.%d is not supported\n", + check->fields.version >> 4, + check->fields.version & 15); + continue; + } + printk(KERN_INFO + "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n", + check->fields.version >> 4, check->fields.version & 15, + check->fields.pm16cseg, check->fields.pm16offset, + check->fields.pm16dseg); + pnp_bios_install = check; + return 1; + } + + printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n"); + return 0; +} + +static int __init exploding_pnp_bios(const struct dmi_system_id *d) +{ + printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident); + return 0; +} + +static const struct dmi_system_id pnpbios_dmi_table[] __initconst = { + { /* PnPBIOS GPF on boot */ + .callback = exploding_pnp_bios, + .ident = "Higraded P14H", + .matches = { + DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), + DMI_MATCH(DMI_BIOS_VERSION, "07.00T"), + DMI_MATCH(DMI_SYS_VENDOR, "Higraded"), + DMI_MATCH(DMI_PRODUCT_NAME, "P14H"), + }, + }, + { /* PnPBIOS GPF on boot */ + .callback = exploding_pnp_bios, + .ident = "ASUS P4P800", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_BOARD_NAME, "P4P800"), + }, + }, + {} +}; + +static int __init pnpbios_init(void) +{ + int ret; + + if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) || + arch_pnpbios_disabled()) { + printk(KERN_INFO "PnPBIOS: Disabled\n"); + return -ENODEV; + } + +#ifdef CONFIG_PNPACPI + if (!acpi_disabled && !pnpacpi_disabled) { + pnpbios_disabled = 1; + printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n"); + return -ENODEV; + } +#endif /* CONFIG_ACPI */ + + /* scan the system for pnpbios support */ + if (!pnpbios_probe_system()) + return -ENODEV; + + /* make preparations for bios calls */ + pnpbios_calls_init(pnp_bios_install); + + /* read the node info */ + ret = pnp_bios_dev_node_info(&node_info); + if (ret) { + printk(KERN_ERR + "PnPBIOS: Unable to get node info. Aborting.\n"); + return ret; + } + + /* register with the pnp layer */ + ret = pnp_register_protocol(&pnpbios_protocol); + if (ret) { + printk(KERN_ERR + "PnPBIOS: Unable to register driver. Aborting.\n"); + return ret; + } + + /* start the proc interface */ + ret = pnpbios_proc_init(); + if (ret) + printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n"); + + /* scan for pnpbios devices */ + build_devlist(); + + pnp_platform_devices = 1; + return 0; +} + +fs_initcall(pnpbios_init); + +static int __init pnpbios_thread_init(void) +{ + struct task_struct *task; + + if (pnpbios_disabled) + return 0; + + init_completion(&unload_sem); + task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd"); + return PTR_ERR_OR_ZERO(task); +} + +/* Start the kernel thread later: */ +device_initcall(pnpbios_thread_init); + +EXPORT_SYMBOL(pnpbios_protocol); diff --git a/drivers/pnp/pnpbios/pnpbios.h b/drivers/pnp/pnpbios/pnpbios.h new file mode 100644 index 000000000..2ce739ff9 --- /dev/null +++ b/drivers/pnp/pnpbios/pnpbios.h @@ -0,0 +1,169 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * pnpbios.h - contains local definitions + */ + +/* + * Include file for the interface to a PnP BIOS + * + * Original BIOS code (C) 1998 Christian Schmidt (chr.schmidt@tu-bs.de) + * PnP handler parts (c) 1998 Tom Lees + * Minor reorganizations by David Hinds + */ + +/* + * Return codes + */ +#define PNP_SUCCESS 0x00 +#define PNP_NOT_SET_STATICALLY 0x7f +#define PNP_UNKNOWN_FUNCTION 0x81 +#define PNP_FUNCTION_NOT_SUPPORTED 0x82 +#define PNP_INVALID_HANDLE 0x83 +#define PNP_BAD_PARAMETER 0x84 +#define PNP_SET_FAILED 0x85 +#define PNP_EVENTS_NOT_PENDING 0x86 +#define PNP_SYSTEM_NOT_DOCKED 0x87 +#define PNP_NO_ISA_PNP_CARDS 0x88 +#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 +#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a +#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b +#define PNP_BUFFER_TOO_SMALL 0x8c +#define PNP_USE_ESCD_SUPPORT 0x8d +#define PNP_MESSAGE_NOT_SUPPORTED 0x8e +#define PNP_HARDWARE_ERROR 0x8f + +#define ESCD_SUCCESS 0x00 +#define ESCD_IO_ERROR_READING 0x55 +#define ESCD_INVALID 0x56 +#define ESCD_BUFFER_TOO_SMALL 0x59 +#define ESCD_NVRAM_TOO_SMALL 0x5a +#define ESCD_FUNCTION_NOT_SUPPORTED 0x81 + +/* + * Events that can be received by "get event" + */ +#define PNPEV_ABOUT_TO_CHANGE_CONFIG 0x0001 +#define PNPEV_DOCK_CHANGED 0x0002 +#define PNPEV_SYSTEM_DEVICE_CHANGED 0x0003 +#define PNPEV_CONFIG_CHANGED_FAILED 0x0004 +#define PNPEV_UNKNOWN_SYSTEM_EVENT 0xffff +/* 0x8000 through 0xfffe are OEM defined */ + +/* + * Messages that should be sent through "send message" + */ +#define PNPMSG_OK 0x00 +#define PNPMSG_ABORT 0x01 +#define PNPMSG_UNDOCK_DEFAULT_ACTION 0x40 +#define PNPMSG_POWER_OFF 0x41 +#define PNPMSG_PNP_OS_ACTIVE 0x42 +#define PNPMSG_PNP_OS_INACTIVE 0x43 + +/* + * Plug and Play BIOS flags + */ +#define PNPBIOS_NO_DISABLE 0x0001 +#define PNPBIOS_NO_CONFIG 0x0002 +#define PNPBIOS_OUTPUT 0x0004 +#define PNPBIOS_INPUT 0x0008 +#define PNPBIOS_BOOTABLE 0x0010 +#define PNPBIOS_DOCK 0x0020 +#define PNPBIOS_REMOVABLE 0x0040 +#define pnpbios_is_static(x) (((x)->flags & 0x0100) == 0x0000) +#define pnpbios_is_dynamic(x) ((x)->flags & 0x0080) + +/* + * Function Parameters + */ +#define PNPMODE_STATIC 1 +#define PNPMODE_DYNAMIC 0 + +/* 0x8000 through 0xffff are OEM defined */ + +#pragma pack(1) +struct pnp_dev_node_info { + __u16 no_nodes; + __u16 max_node_size; +}; +struct pnp_docking_station_info { + __u32 location_id; + __u32 serial; + __u16 capabilities; +}; +struct pnp_isa_config_struc { + __u8 revision; + __u8 no_csns; + __u16 isa_rd_data_port; + __u16 reserved; +}; +struct escd_info_struc { + __u16 min_escd_write_size; + __u16 escd_size; + __u32 nv_storage_base; +}; +struct pnp_bios_node { + __u16 size; + __u8 handle; + __u32 eisa_id; + __u8 type_code[3]; + __u16 flags; + __u8 data[]; +}; +#pragma pack() + +/* non-exported */ +extern struct pnp_dev_node_info node_info; + +extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data); +extern int pnp_bios_get_dev_node(u8 *nodenum, char config, + struct pnp_bios_node *data); +extern int pnp_bios_set_dev_node(u8 nodenum, char config, + struct pnp_bios_node *data); +extern int pnp_bios_get_stat_res(char *info); +extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data); +extern int pnp_bios_escd_info(struct escd_info_struc *data); +extern int pnp_bios_read_escd(char *data, u32 nvram_base); +extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data); + +#pragma pack(1) +union pnp_bios_install_struct { + struct { + u32 signature; /* "$PnP" */ + u8 version; /* in BCD */ + u8 length; /* length in bytes, currently 21h */ + u16 control; /* system capabilities */ + u8 checksum; /* all bytes must add up to 0 */ + + u32 eventflag; /* phys. address of the event flag */ + u16 rmoffset; /* real mode entry point */ + u16 rmcseg; + u16 pm16offset; /* 16 bit protected mode entry */ + u32 pm16cseg; + u32 deviceID; /* EISA encoded system ID or 0 */ + u16 rmdseg; /* real mode data segment */ + u32 pm16dseg; /* 16 bit pm data segment base */ + } fields; + char chars[0x21]; /* To calculate the checksum */ +}; +#pragma pack() + +extern int pnp_bios_present(void); +extern int pnpbios_dont_use_current_config; + +extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node); +extern int pnpbios_read_resources_from_node(struct pnp_dev *dev, struct pnp_bios_node *node); +extern int pnpbios_write_resources_to_node(struct pnp_dev *dev, struct pnp_bios_node *node); +extern void pnpid32_to_pnpid(u32 id, char *str); + +extern void pnpbios_print_status(const char * module, u16 status); +extern void pnpbios_calls_init(union pnp_bios_install_struct * header); + +#ifdef CONFIG_PNPBIOS_PROC_FS +extern int pnpbios_interface_attach_device(struct pnp_bios_node * node); +extern int pnpbios_proc_init (void); +extern void pnpbios_proc_exit (void); +#else +static inline int pnpbios_interface_attach_device(struct pnp_bios_node * node) { return 0; } +static inline int pnpbios_proc_init (void) { return 0; } +static inline void pnpbios_proc_exit (void) { ; } +#endif /* CONFIG_PNPBIOS_PROC_FS */ diff --git a/drivers/pnp/pnpbios/proc.c b/drivers/pnp/pnpbios/proc.c new file mode 100644 index 000000000..a806830e3 --- /dev/null +++ b/drivers/pnp/pnpbios/proc.c @@ -0,0 +1,286 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * /proc/bus/pnp interface for Plug and Play devices + * + * Written by David Hinds, dahinds@users.sourceforge.net + * Modified by Thomas Hood + * + * The .../devices and .../ and .../boot/ files are + * utilized by the lspnp and setpnp utilities, supplied with the + * pcmcia-cs package. + * http://pcmcia-cs.sourceforge.net + * + * The .../escd file is utilized by the lsescd utility written by + * Gunther Mayer. + * + * The .../legacy_device_resources file is not used yet. + * + * The other files are human-readable. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "pnpbios.h" + +static struct proc_dir_entry *proc_pnp = NULL; +static struct proc_dir_entry *proc_pnp_boot = NULL; + +static int pnpconfig_proc_show(struct seq_file *m, void *v) +{ + struct pnp_isa_config_struc pnps; + + if (pnp_bios_isapnp_config(&pnps)) + return -EIO; + seq_printf(m, "structure_revision %d\n" + "number_of_CSNs %d\n" + "ISA_read_data_port 0x%x\n", + pnps.revision, pnps.no_csns, pnps.isa_rd_data_port); + return 0; +} + +static int escd_info_proc_show(struct seq_file *m, void *v) +{ + struct escd_info_struc escd; + + if (pnp_bios_escd_info(&escd)) + return -EIO; + seq_printf(m, "min_ESCD_write_size %d\n" + "ESCD_size %d\n" + "NVRAM_base 0x%x\n", + escd.min_escd_write_size, + escd.escd_size, escd.nv_storage_base); + return 0; +} + +#define MAX_SANE_ESCD_SIZE (32*1024) +static int escd_proc_show(struct seq_file *m, void *v) +{ + struct escd_info_struc escd; + char *tmpbuf; + int escd_size; + + if (pnp_bios_escd_info(&escd)) + return -EIO; + + /* sanity check */ + if (escd.escd_size > MAX_SANE_ESCD_SIZE) { + printk(KERN_ERR + "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__); + return -EFBIG; + } + + tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL); + if (!tmpbuf) + return -ENOMEM; + + if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) { + kfree(tmpbuf); + return -EIO; + } + + escd_size = + (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256; + + /* sanity check */ + if (escd_size > MAX_SANE_ESCD_SIZE) { + printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by" + " BIOS read_escd call is too great\n", __func__); + kfree(tmpbuf); + return -EFBIG; + } + + seq_write(m, tmpbuf, escd_size); + kfree(tmpbuf); + return 0; +} + +static int pnp_legacyres_proc_show(struct seq_file *m, void *v) +{ + void *buf; + + buf = kmalloc(65536, GFP_KERNEL); + if (!buf) + return -ENOMEM; + if (pnp_bios_get_stat_res(buf)) { + kfree(buf); + return -EIO; + } + + seq_write(m, buf, 65536); + kfree(buf); + return 0; +} + +static int pnp_devices_proc_show(struct seq_file *m, void *v) +{ + struct pnp_bios_node *node; + u8 nodenum; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + + for (nodenum = 0; nodenum < 0xff;) { + u8 thisnodenum = nodenum; + + if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node)) + break; + seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n", + node->handle, node->eisa_id, + node->type_code, node->flags); + if (nodenum <= thisnodenum) { + printk(KERN_ERR + "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", + "PnPBIOS: proc_read_devices:", + (unsigned int)nodenum, + (unsigned int)thisnodenum); + break; + } + } + kfree(node); + return 0; +} + +static int pnpbios_proc_show(struct seq_file *m, void *v) +{ + void *data = m->private; + struct pnp_bios_node *node; + int boot = (long)data >> 8; + u8 nodenum = (long)data; + int len; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + if (pnp_bios_get_dev_node(&nodenum, boot, node)) { + kfree(node); + return -EIO; + } + len = node->size - sizeof(struct pnp_bios_node); + seq_write(m, node->data, len); + kfree(node); + return 0; +} + +static int pnpbios_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pnpbios_proc_show, PDE_DATA(inode)); +} + +static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf, + size_t count, loff_t *pos) +{ + void *data = PDE_DATA(file_inode(file)); + struct pnp_bios_node *node; + int boot = (long)data >> 8; + u8 nodenum = (long)data; + int ret = count; + + node = kzalloc(node_info.max_node_size, GFP_KERNEL); + if (!node) + return -ENOMEM; + if (pnp_bios_get_dev_node(&nodenum, boot, node)) { + ret = -EIO; + goto out; + } + if (count != node->size - sizeof(struct pnp_bios_node)) { + ret = -EINVAL; + goto out; + } + if (copy_from_user(node->data, buf, count)) { + ret = -EFAULT; + goto out; + } + if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) { + ret = -EINVAL; + goto out; + } + ret = count; +out: + kfree(node); + return ret; +} + +static const struct proc_ops pnpbios_proc_ops = { + .proc_open = pnpbios_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = pnpbios_proc_write, +}; + +int pnpbios_interface_attach_device(struct pnp_bios_node *node) +{ + char name[3]; + + sprintf(name, "%02x", node->handle); + + if (!proc_pnp) + return -EIO; + if (!pnpbios_dont_use_current_config) { + proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_ops, + (void *)(long)(node->handle)); + } + + if (!proc_pnp_boot) + return -EIO; + if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_ops, + (void *)(long)(node->handle + 0x100))) + return 0; + return -EIO; +} + +/* + * When this is called, pnpbios functions are assumed to + * work and the pnpbios_dont_use_current_config flag + * should already have been set to the appropriate value + */ +int __init pnpbios_proc_init(void) +{ + proc_pnp = proc_mkdir("bus/pnp", NULL); + if (!proc_pnp) + return -EIO; + proc_pnp_boot = proc_mkdir("boot", proc_pnp); + if (!proc_pnp_boot) + return -EIO; + proc_create_single("devices", 0, proc_pnp, pnp_devices_proc_show); + proc_create_single("configuration_info", 0, proc_pnp, + pnpconfig_proc_show); + proc_create_single("escd_info", 0, proc_pnp, escd_info_proc_show); + proc_create_single("escd", S_IRUSR, proc_pnp, escd_proc_show); + proc_create_single("legacy_device_resources", 0, proc_pnp, + pnp_legacyres_proc_show); + return 0; +} + +void __exit pnpbios_proc_exit(void) +{ + int i; + char name[3]; + + if (!proc_pnp) + return; + + for (i = 0; i < 0xff; i++) { + sprintf(name, "%02x", i); + if (!pnpbios_dont_use_current_config) + remove_proc_entry(name, proc_pnp); + remove_proc_entry(name, proc_pnp_boot); + } + remove_proc_entry("legacy_device_resources", proc_pnp); + remove_proc_entry("escd", proc_pnp); + remove_proc_entry("escd_info", proc_pnp); + remove_proc_entry("configuration_info", proc_pnp); + remove_proc_entry("devices", proc_pnp); + remove_proc_entry("boot", proc_pnp); + remove_proc_entry("bus/pnp", NULL); +} diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c new file mode 100644 index 000000000..2f31b212b --- /dev/null +++ b/drivers/pnp/pnpbios/rsparser.c @@ -0,0 +1,810 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * rsparser.c - parses and encodes pnpbios resource data streams + */ + +#include +#include +#include + +#ifdef CONFIG_PCI +#include +#else +inline void pcibios_penalize_isa_irq(int irq, int active) +{ +} +#endif /* CONFIG_PCI */ + +#include "../base.h" +#include "pnpbios.h" + +/* standard resource tags */ +#define SMALL_TAG_PNPVERNO 0x01 +#define SMALL_TAG_LOGDEVID 0x02 +#define SMALL_TAG_COMPATDEVID 0x03 +#define SMALL_TAG_IRQ 0x04 +#define SMALL_TAG_DMA 0x05 +#define SMALL_TAG_STARTDEP 0x06 +#define SMALL_TAG_ENDDEP 0x07 +#define SMALL_TAG_PORT 0x08 +#define SMALL_TAG_FIXEDPORT 0x09 +#define SMALL_TAG_VENDOR 0x0e +#define SMALL_TAG_END 0x0f +#define LARGE_TAG 0x80 +#define LARGE_TAG_MEM 0x81 +#define LARGE_TAG_ANSISTR 0x82 +#define LARGE_TAG_UNICODESTR 0x83 +#define LARGE_TAG_VENDOR 0x84 +#define LARGE_TAG_MEM32 0x85 +#define LARGE_TAG_FIXEDMEM32 0x86 + +/* + * Resource Data Stream Format: + * + * Allocated Resources (required) + * end tag -> + * Resource Configuration Options (optional) + * end tag -> + * Compitable Device IDs (optional) + * final end tag -> + */ + +/* + * Allocated Resources + */ + +static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev, + int start, int len) +{ + int flags = 0; + int end = start + len - 1; + + if (len <= 0 || end >= 0x10003) + flags |= IORESOURCE_DISABLED; + + pnp_add_io_resource(dev, start, end, flags); +} + +static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev, + int start, int len) +{ + int flags = 0; + int end = start + len - 1; + + if (len <= 0) + flags |= IORESOURCE_DISABLED; + + pnp_add_mem_resource(dev, start, end, flags); +} + +static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev, + unsigned char *p, + unsigned char *end) +{ + unsigned int len, tag; + int io, size, mask, i, flags; + + if (!p) + return NULL; + + pnp_dbg(&dev->dev, "parse allocated resources\n"); + + pnp_init_resources(dev); + + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_MEM: + if (len != 9) + goto len_err; + io = *(short *)&p[4]; + size = *(short *)&p[10]; + pnpbios_parse_allocated_memresource(dev, io, size); + break; + + case LARGE_TAG_ANSISTR: + /* ignore this for now */ + break; + + case LARGE_TAG_VENDOR: + /* do nothing */ + break; + + case LARGE_TAG_MEM32: + if (len != 17) + goto len_err; + io = *(int *)&p[4]; + size = *(int *)&p[16]; + pnpbios_parse_allocated_memresource(dev, io, size); + break; + + case LARGE_TAG_FIXEDMEM32: + if (len != 9) + goto len_err; + io = *(int *)&p[4]; + size = *(int *)&p[8]; + pnpbios_parse_allocated_memresource(dev, io, size); + break; + + case SMALL_TAG_IRQ: + if (len < 2 || len > 3) + goto len_err; + flags = 0; + io = -1; + mask = p[1] + p[2] * 256; + for (i = 0; i < 16; i++, mask = mask >> 1) + if (mask & 0x01) + io = i; + if (io != -1) + pcibios_penalize_isa_irq(io, 1); + else + flags = IORESOURCE_DISABLED; + pnp_add_irq_resource(dev, io, flags); + break; + + case SMALL_TAG_DMA: + if (len != 2) + goto len_err; + flags = 0; + io = -1; + mask = p[1]; + for (i = 0; i < 8; i++, mask = mask >> 1) + if (mask & 0x01) + io = i; + if (io == -1) + flags = IORESOURCE_DISABLED; + pnp_add_dma_resource(dev, io, flags); + break; + + case SMALL_TAG_PORT: + if (len != 7) + goto len_err; + io = p[2] + p[3] * 256; + size = p[7]; + pnpbios_parse_allocated_ioresource(dev, io, size); + break; + + case SMALL_TAG_VENDOR: + /* do nothing */ + break; + + case SMALL_TAG_FIXEDPORT: + if (len != 3) + goto len_err; + io = p[1] + p[2] * 256; + size = p[3]; + pnpbios_parse_allocated_ioresource(dev, io, size); + break; + + case SMALL_TAG_END: + p = p + 2; + return (unsigned char *)p; + break; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Resource Configuration Options + */ + +static __init void pnpbios_parse_mem_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t min, max, align, len; + unsigned char flags; + + min = ((p[5] << 8) | p[4]) << 8; + max = ((p[7] << 8) | p[6]) << 8; + align = (p[9] << 8) | p[8]; + len = ((p[11] << 8) | p[10]) << 8; + flags = p[3]; + pnp_register_mem_resource(dev, option_flags, min, max, align, len, + flags); +} + +static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t min, max, align, len; + unsigned char flags; + + min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; + max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; + align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12]; + len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16]; + flags = p[3]; + pnp_register_mem_resource(dev, option_flags, min, max, align, len, + flags); +} + +static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t base, len; + unsigned char flags; + + base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; + len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; + flags = p[3]; + pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); +} + +static __init void pnpbios_parse_irq_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + unsigned long bits; + pnp_irq_mask_t map; + unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; + + bits = (p[2] << 8) | p[1]; + + bitmap_zero(map.bits, PNP_IRQ_NR); + bitmap_copy(map.bits, &bits, 16); + + if (size > 2) + flags = p[3]; + + pnp_register_irq_resource(dev, option_flags, &map, flags); +} + +static __init void pnpbios_parse_dma_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + pnp_register_dma_resource(dev, option_flags, p[1], p[2]); +} + +static __init void pnpbios_parse_port_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t min, max, align, len; + unsigned char flags; + + min = (p[3] << 8) | p[2]; + max = (p[5] << 8) | p[4]; + align = p[6]; + len = p[7]; + flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0; + pnp_register_port_resource(dev, option_flags, min, max, align, len, + flags); +} + +static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev, + unsigned char *p, int size, + unsigned int option_flags) +{ + resource_size_t base, len; + + base = (p[2] << 8) | p[1]; + len = p[3]; + pnp_register_port_resource(dev, option_flags, base, base, 0, len, + IORESOURCE_IO_FIXED); +} + +static __init unsigned char * +pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end, + struct pnp_dev *dev) +{ + unsigned int len, tag; + int priority; + unsigned int option_flags; + + if (!p) + return NULL; + + pnp_dbg(&dev->dev, "parse resource options\n"); + option_flags = 0; + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_MEM: + if (len != 9) + goto len_err; + pnpbios_parse_mem_option(dev, p, len, option_flags); + break; + + case LARGE_TAG_MEM32: + if (len != 17) + goto len_err; + pnpbios_parse_mem32_option(dev, p, len, option_flags); + break; + + case LARGE_TAG_FIXEDMEM32: + if (len != 9) + goto len_err; + pnpbios_parse_fixed_mem32_option(dev, p, len, + option_flags); + break; + + case SMALL_TAG_IRQ: + if (len < 2 || len > 3) + goto len_err; + pnpbios_parse_irq_option(dev, p, len, option_flags); + break; + + case SMALL_TAG_DMA: + if (len != 2) + goto len_err; + pnpbios_parse_dma_option(dev, p, len, option_flags); + break; + + case SMALL_TAG_PORT: + if (len != 7) + goto len_err; + pnpbios_parse_port_option(dev, p, len, option_flags); + break; + + case SMALL_TAG_VENDOR: + /* do nothing */ + break; + + case SMALL_TAG_FIXEDPORT: + if (len != 3) + goto len_err; + pnpbios_parse_fixed_port_option(dev, p, len, + option_flags); + break; + + case SMALL_TAG_STARTDEP: + if (len > 1) + goto len_err; + priority = PNP_RES_PRIORITY_ACCEPTABLE; + if (len > 0) + priority = p[1]; + option_flags = pnp_new_dependent_set(dev, priority); + break; + + case SMALL_TAG_ENDDEP: + if (len != 0) + goto len_err; + option_flags = 0; + break; + + case SMALL_TAG_END: + return p + 2; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Compatible Device IDs + */ + +static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p, + unsigned char *end, + struct pnp_dev *dev) +{ + int len, tag; + u32 eisa_id; + char id[8]; + struct pnp_id *dev_id; + + if (!p) + return NULL; + + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_ANSISTR: + strncpy(dev->name, p + 3, + len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len); + dev->name[len >= + PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0'; + break; + + case SMALL_TAG_COMPATDEVID: /* compatible ID */ + if (len != 4) + goto len_err; + eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24; + pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id); + dev_id = pnp_add_id(dev, id); + if (!dev_id) + return NULL; + break; + + case SMALL_TAG_END: + p = p + 2; + return (unsigned char *)p; + break; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Allocated Resource Encoding + */ + +static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[4] = (base >> 8) & 0xff; + p[5] = ((base >> 8) >> 8) & 0xff; + p[6] = (base >> 8) & 0xff; + p[7] = ((base >> 8) >> 8) & 0xff; + p[10] = (len >> 8) & 0xff; + p[11] = ((len >> 8) >> 8) & 0xff; + + pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n", base, base + len - 1); +} + +static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[4] = base & 0xff; + p[5] = (base >> 8) & 0xff; + p[6] = (base >> 16) & 0xff; + p[7] = (base >> 24) & 0xff; + p[8] = base & 0xff; + p[9] = (base >> 8) & 0xff; + p[10] = (base >> 16) & 0xff; + p[11] = (base >> 24) & 0xff; + p[16] = len & 0xff; + p[17] = (len >> 8) & 0xff; + p[18] = (len >> 16) & 0xff; + p[19] = (len >> 24) & 0xff; + + pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n", base, base + len - 1); +} + +static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[4] = base & 0xff; + p[5] = (base >> 8) & 0xff; + p[6] = (base >> 16) & 0xff; + p[7] = (base >> 24) & 0xff; + p[8] = len & 0xff; + p[9] = (len >> 8) & 0xff; + p[10] = (len >> 16) & 0xff; + p[11] = (len >> 24) & 0xff; + + pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n", base, + base + len - 1); +} + +static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long map; + + if (pnp_resource_enabled(res)) + map = 1 << res->start; + else + map = 0; + + p[1] = map & 0xff; + p[2] = (map >> 8) & 0xff; + + pnp_dbg(&dev->dev, " encode irq mask %#lx\n", map); +} + +static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long map; + + if (pnp_resource_enabled(res)) + map = 1 << res->start; + else + map = 0; + + p[1] = map & 0xff; + + pnp_dbg(&dev->dev, " encode dma mask %#lx\n", map); +} + +static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base; + unsigned long len; + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[2] = base & 0xff; + p[3] = (base >> 8) & 0xff; + p[4] = base & 0xff; + p[5] = (base >> 8) & 0xff; + p[7] = len & 0xff; + + pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n", base, base + len - 1); +} + +static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p, + struct resource *res) +{ + unsigned long base = res->start; + unsigned long len = resource_size(res); + + if (pnp_resource_enabled(res)) { + base = res->start; + len = resource_size(res); + } else { + base = 0; + len = 0; + } + + p[1] = base & 0xff; + p[2] = (base >> 8) & 0xff; + p[3] = len & 0xff; + + pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n", base, + base + len - 1); +} + +static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev + *dev, + unsigned char *p, + unsigned char *end) +{ + unsigned int len, tag; + int port = 0, irq = 0, dma = 0, mem = 0; + + if (!p) + return NULL; + + while ((char *)p < (char *)end) { + + /* determine the type of tag */ + if (p[0] & LARGE_TAG) { /* large tag */ + len = (p[2] << 8) | p[1]; + tag = p[0]; + } else { /* small tag */ + len = p[0] & 0x07; + tag = ((p[0] >> 3) & 0x0f); + } + + switch (tag) { + + case LARGE_TAG_MEM: + if (len != 9) + goto len_err; + pnpbios_encode_mem(dev, p, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + + case LARGE_TAG_MEM32: + if (len != 17) + goto len_err; + pnpbios_encode_mem32(dev, p, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + + case LARGE_TAG_FIXEDMEM32: + if (len != 9) + goto len_err; + pnpbios_encode_fixed_mem32(dev, p, + pnp_get_resource(dev, IORESOURCE_MEM, mem)); + mem++; + break; + + case SMALL_TAG_IRQ: + if (len < 2 || len > 3) + goto len_err; + pnpbios_encode_irq(dev, p, + pnp_get_resource(dev, IORESOURCE_IRQ, irq)); + irq++; + break; + + case SMALL_TAG_DMA: + if (len != 2) + goto len_err; + pnpbios_encode_dma(dev, p, + pnp_get_resource(dev, IORESOURCE_DMA, dma)); + dma++; + break; + + case SMALL_TAG_PORT: + if (len != 7) + goto len_err; + pnpbios_encode_port(dev, p, + pnp_get_resource(dev, IORESOURCE_IO, port)); + port++; + break; + + case SMALL_TAG_VENDOR: + /* do nothing */ + break; + + case SMALL_TAG_FIXEDPORT: + if (len != 3) + goto len_err; + pnpbios_encode_fixed_port(dev, p, + pnp_get_resource(dev, IORESOURCE_IO, port)); + port++; + break; + + case SMALL_TAG_END: + p = p + 2; + return (unsigned char *)p; + break; + + default: /* an unknown tag */ +len_err: + dev_err(&dev->dev, "unknown tag %#x length %d\n", + tag, len); + break; + } + + /* continue to the next tag */ + if (p[0] & LARGE_TAG) + p += len + 3; + else + p += len + 1; + } + + dev_err(&dev->dev, "no end tag in resource structure\n"); + + return NULL; +} + +/* + * Core Parsing Functions + */ + +int __init pnpbios_parse_data_stream(struct pnp_dev *dev, + struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + + p = pnpbios_parse_allocated_resource_data(dev, p, end); + if (!p) + return -EIO; + p = pnpbios_parse_resource_option_data(p, end, dev); + if (!p) + return -EIO; + p = pnpbios_parse_compatible_ids(p, end, dev); + if (!p) + return -EIO; + return 0; +} + +int pnpbios_read_resources_from_node(struct pnp_dev *dev, + struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + + p = pnpbios_parse_allocated_resource_data(dev, p, end); + if (!p) + return -EIO; + return 0; +} + +int pnpbios_write_resources_to_node(struct pnp_dev *dev, + struct pnp_bios_node *node) +{ + unsigned char *p = (char *)node->data; + unsigned char *end = (char *)(node->data + node->size); + + p = pnpbios_encode_allocated_resource_data(dev, p, end); + if (!p) + return -EIO; + return 0; +} -- cgit v1.2.3